Network traffic annotation added to URLLoaderImpl.

net/traffic_annotation/network_traffic_annotation.h

Index: net/traffic_annotation/network_traffic_annotation.h
diff --git a/net/traffic_annotation/network_traffic_annotation.h b/net/traffic_annotation/network_traffic_annotation.h
index 69c620655806300d8974997acace2b0578d64630..84f05b9283429da3a8b9887b32ddc1f7e4fb54cc 100644
--- a/net/traffic_annotation/network_traffic_annotation.h
+++ b/net/traffic_annotation/network_traffic_annotation.h
@@ -194,6 +194,58 @@ NetworkTrafficAnnotationTag BranchedCompleteNetworkTrafficAnnotation(
 //   }
 // }
 
+#define TRAFFIC_ANNOTATION_UNINITIALIZED -1
+
+// Do not use this unless net-serialization is required.
+// TODO(crbug.com/690323): Add tools to check constructor of this structure is
+// used only in .mojom.cc files.
+struct MutableNetworkTrafficAnnotationTag {
+  MutableNetworkTrafficAnnotationTag()
+      : unique_id_hash_code(TRAFFIC_ANNOTATION_UNINITIALIZED) {}
+  explicit MutableNetworkTrafficAnnotationTag(
+      const NetworkTrafficAnnotationTag& traffic_annotation)
+      : unique_id_hash_code(traffic_annotation.unique_id_hash_code) {}
+
+  int32_t unique_id_hash_code;
+
+  explicit operator NetworkTrafficAnnotationTag() const {
+    return NetworkTrafficAnnotationTag({unique_id_hash_code});
+  }
+};
+
+struct MutablePartialNetworkTrafficAnnotationTag {
+#if defined(_DEBUG) || defined(DCHECK_ALWAYS_ON)

[jochen (gone - plz use gerrit), 2017/06/08 17:00:58]

why _DEBUG? 

[Ramin Halavati, 2017/06/09 07:08:53]

Replaced it with '#ifndef NDEBUG' for all cases.

+  MutablePartialNetworkTrafficAnnotationTag()
+      : unique_id_hash_code(TRAFFIC_ANNOTATION_UNINITIALIZED),
+        completing_id_hash_code(TRAFFIC_ANNOTATION_UNINITIALIZED) {}
+  explicit MutablePartialNetworkTrafficAnnotationTag(
+      const PartialNetworkTrafficAnnotationTag& partial_traffic_annotation)
+      : unique_id_hash_code(partial_traffic_annotation.unique_id_hash_code),
+        completing_id_hash_code(
+            partial_traffic_annotation.completing_id_hash_code) {}
+
+  int32_t unique_id_hash_code;
+  int32_t completing_id_hash_code;
+
+  explicit operator PartialNetworkTrafficAnnotationTag() const {
+    return PartialNetworkTrafficAnnotationTag(
+        {unique_id_hash_code, completing_id_hash_code});
+  }
+#else
+  MutablePartialNetworkTrafficAnnotationTag()
+      : unique_id_hash_code(TRAFFIC_ANNOTATION_UNINITIALIZED) {}
+  explicit MutablePartialNetworkTrafficAnnotationTag(
+      const PartialNetworkTrafficAnnotationTag& partial_traffic_annotation)
+      : unique_id_hash_code(partial_traffic_annotation.unique_id_hash_code) {}
+
+  int32_t unique_id_hash_code;
+
+  explicit operator PartialNetworkTrafficAnnotationTag() const {
+    return PartialNetworkTrafficAnnotationTag({unique_id_hash_code});
+  }
+#endif  // defined(_DEBUG) || defined(DCHECK_ALWAYS_ON)
+};
+
 }  // namespace net
 
 // Placeholder for unannotated usages.